Jon Johnson Posted April 10, 2017 Report Share Posted April 10, 2017 The Ace Tone Rhythm Ace FR-3 released in 1967 offered 8 different preset sounds with preset buttons with 2-beat and 4-beat variations. It has knobs allowing for individual control for balance, volume, variation and tempo. It also included a foot switch jack for starting and stopping the rhythms. It is considered the forerunner to the Roland TR series of drum machines. View full drum machine Quote Link to post Share on other sites
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